Are you going to use Yveltal or Xernas in your
main team?

Yes, Where will I'm going to use him? I can't use them in the battle towers and is frown upon to use them online.---In every loss, in every lie, in every truth that you'd denyAnd each regret and each goodbye was a mistake too great to hide.

Probably not. I only used Legendaries on my team in Gen I. Ever since Gold and learning about competitive battling I only collect them.---"It's a basic truth of the human condition that everybody lies. The only variable is about what." - Dr. House